Cryptology ePrint Archive: BibTeX Citation of Report 2011/030

@misc{cryptoeprint:2011:030,
    author = {Vorapong Suppakitpaisarn and Masato Edahiro and Hiroshi Imai},
    title = {Fast Elliptic Curve Cryptography Using Optimal Double-Base Chains},
    howpublished = {Cryptology ePrint Archive, Report 2011/030},
    year = {2011},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.